Of the 193 member countries of the United Nations, 54 are in the African Group and 23

Question:

Of the 193 member countries of the United Nations, 54 are in the African Group and 23 are in the Eastern European Group. Suppose that a country is selected at random from the members of the United Nations.
(a) What is the probability that the country is in the African Group?
(b) What is the probability that the country is in the African Group or the Eastern European Group?
(c) What is the probability that the country is in neither the African Group nor the Eastern European Group?